Hi,
I use a lot Akeeba Solo and I have managed to create a good workflow that allows me, not only backing up my sites, but also restore them with Akeeba UNiTE for testing in my development server.
I usually store my backups in a S3 provider, so it is kind of easy to just fetch de file using the S3 downloader of UNiTE and let the process working unattended.
The only point which I find a bit cumbersome is writing the XML file for UNiTE, specially since I use a random keyword in the name of the files.
I think it will be great to have a button next to the "download" button or inside the info box, that allows you to download an XML file that you can feed directly in UNiTE with all required parameters (S3 keys, bucket, path, filename...)
Best!!